Suction accessory system and crankcase ventilator



A. RAPPL July 22, 1952 SUCTION ACCESSORY SYSTEM AND CRANKCASE VENTILATOR Filed Oct. 4,' 1947 INVENTOR 220/7 fiqa o/ BY (M M @M,

' ATTORVIGEYS herein is automatic. This automatic vent comprises a casing 29 having a port 3 normally closed by a valve (it under the urge of the spring 32 during accessory operation. The port 30 opens through the side wall of the suction passage l -so that when the valve'is'opened against the urge of the spring, atmospheric air will enter the passage and be delivered by the pump into the crank case; To insure a clean supply of air, the port may be connected to the air intake pipe 33 immediately beneath the air strainer by a hose connection 34. An auxiliary motor has a piston 35 operating in a chamber 36 and connected to the stem 31 of the valve 3|. That portion of the chamber above the piston 35:1s

connected by a tube 38 to a duct 39 leading ofi from the port I! with the result that the upper side of the chamber 36 will be opened to the" atmosphere when the control valve 8 is in its,

parked position. The low pressure influence in the passage l 5' will cause the piston 35-to depress against the action of the spring 32 and open the venting valvefil for supplying the pump with fresh air by'which maintenance of crankcase ventilation may be insured. When the accessory is turned on by shifting the control valve 8' to its full lineposition, the passage 38 ,will practically evacuatethe 'air content from the chamber 3Bi above the piston to enable the spring 32. to close the vent 39. V

From the foregoing sofas to close during accessory operation and therefore its presencewill not affect the efficient simple. and practical and provides an efiicient means for circulating a cooling air stream through I the engine crank case, and while the foregoing description has been given in detail, it is without thought of limitation since. the inventive principles involved herein are capableof assuming other physical embodiments without departing from the spirit of the invention and the scope of the appended claims. ,What is claimed is:

' when the first piston is arrested, andmeans co-' I v p o 7 it will" be observed that there will be a constant air circulationthrough the engine crank case. The vent is automatic 135 operation of the accessory, The invention. is.

:1. A vehicle power plant of the internal com-.

bustiontype having an engine with a crank case opening to the. atmosphere, an accessory system 7 having a suction operated motor, an engine driven Y pump dischargin into the-crank case and operatively connected by a passage to the accessory for-generating an operative low pressure, said, motor having a chamber and a piston therein; ;a

control valve having a running portand aparking port selectively connectible. to "the motor for, respectively operating the motor and holding the piston in an arrested position in which latter;- position airflow through thepas'sage is substantially, nil' while the'pump continues to operate,

and,an'-atmospheric vent in the passage, a valve closing the vent, an auxiliary fluid motor having a chamber in open communication with the passage, a piston in the'second chamber having operativeconnection with the second valve and a second passage connecting the control. valve to the second chamber at the opposite side of its piston for creating an operating pressure dif fer'entialffor the second piston to actuate the sec- 7 0nd valve when the first motor is arrested. i

2. 'In combination, a motor vehicle engine hav inga crankcase, a suction generating pump constantly driven by the engine and discharging into.

the crank case to effectan airflow therethrough m i Q wer er {aiSuctiOIl m4:

and, an atmospheric venting valve arranged in the passage, and an auxiliary fluid motor connected to the venting valve for opening the same operating withthe control valve for actuating theauxiliary' motor.

3. The combination with a motor vehicle engine having a crank case, a suction generating pump constantly driven by the engine and discharging its air content into the crank case to effect an airflow therethrough for carrying off volatile matter,'a suction actuated accessory connected by a passage to the pumpfor fluid op eration thereby, and a control valve for the accessory movable from anaccessory running position to an .acoessoryparked position in which latter position the pump is connected to the accessory to hold the latter inoperative by the gen-. erated suction, of anautomatic vent having a valve and afluid motor for openingand closing a the same, and energized through the control valve when the latter is in its accessory parked position.

driven from the engine and discharging into the crank case, a suction actuated accessory connected to the pump for operation thereby, a control valve for the accessory movable from an ac- 1 cessoryrunning position to an accessory parked:

position in; which latter position the pump, is connected to theaccessory toghold the latter inoperative by the generated suction, avalve.nor-,

mally closing a vent in the suctior'i linebetween the pump and the accessory, and an auxiliary fluid motor responsive to the pump suction and,

connected to the vent closing valve to open the ventwhen the control valveis in its parked position; 7

a suction generating pump driven by the engine and discharging into the crankcase to efiect an airflow therethrough for carryingofi volatile mat- I ter, a s uc ti on actuated accessory connected to the pump for operation thereby, a control valve for the; accessory movable from an accessory running position to an accessory parkedposition in which latter the pump isconnected to the accesso'ry to hold the latter inoperative by thegeneratecl. suction, a spring-seated valve normally closing; a vent in the suction line betwee n the pumpand the accessory, an auxiliary motor for unseating the vent-closing valve, said motor. having a chamber and a piston therein operatively connected tothe vent-closingvalve for so unseating it, and a fluid passage from the chamber; to the control valve for being opened thereby when in a parked position to energize the auxiliary motor for so unseating the vent-closingvalve.

5- The P mb fi id ha r h clee cl gme having a crank case, a suction generating,-

pump' constantly' driven by the. engine and discharging its air content into thecrank case to.

In combination, a motor vehicle engine hav ing a crank case, a suction. generating pump 5 A motor vehicle engine h avinga crank case, an air strainer connected to the engine carburetor,

effect an airflow therethrough for carrying of! volatile matter, a suction actuated accessory connected by a passage to the pump for fluid operation thereby, a control valve for the accessory movable from an accessory rumiing position to an accessory parked position in which latter position the pump is connected to the accessory to hold the latter inoperative by the generated suction, of an automatic vent responsive to the pressure difierential between the pump suction on one side and the atmospheric pressure on the opposite side to vent the passage to the atmosphere when the accessory is arrested, means operable by the control valve for establishing communication between said opposite side 01' the automatic vent and the pump to balance the pressures when the accessory is so operating, and spring means closing the vent when the pressures are so balanced.

7. In combination, a motor vehicle engine having a crank case, asuction generating pump driven from the engine and discharging into the crank case, a suction actuated accessory connected to the pump for operation thereby, a control valve for the accessory movable from an acsponsive to the pump suction to open the vent when th control valve is in its parked position, and means operable with the control valve for establishing communication between the pump and the auxiliary motor when the accessory is operating and for breaking such communication when the accessory is arrested.

ANTON RAPPL,

REFERENCES CITED The following references are of record in the file of this patent: V

UNITED STATES PATENTS Number Name Date 2,147,405 Horton Feb. 14, 1939 2,160,737 Horton May 30, 1939 2,484,139 Witchger Oct. 11, 1949' 

